Feedback regulation of COOLAIR expression controls seed dormancy and flowering time
Feedback regulation of COOLAIR expression controls seed dormancy and flowering time
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DOI：
10.1126/science.aar7361
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发表时间：
2018-06-01
期刊：
影响因子：
56.9
通讯作者：
Penfield, Steven
中科院分区：
文献类型：
--
作者：
Chen, Min;Penfield, Steven
植物整合季节性信号，包括温度和日长，以优化发育过渡的时机。季节感应需要两种蛋白质的活性，开花基因C(FLC)和开花基因T(FT)，它们控制着植物的某些发育转变。在生殖发育过程中，母株利用FLC和FT调节子代种子休眠对温度的反应。我们发现，对于种子休眠的调节，FLC和FT的功能与这两个基因控制开花时间的配置相反。对于种子休眠，FT通过FLC基因表达调节种子休眠，通过激活反义FLC转录调节染色质状态。因此，在拟南芥中，同样的基因以相反的形式控制着开花时间和种子休眠，以响应温度变化的季节特征。
Plants integrate seasonal signals, including temperature and day length, to optimize the timing of developmental transitions. Seasonal sensing requires the activity of two proteins, FLOWERING LOCUS C (FLC) and FLOWERING LOCUS T (FT), that control certain developmental transitions in plants. During reproductive development, the mother plant uses FLC and FT to modulate progeny seed dormancy in response to temperature. We found that for regulation of seed dormancy, FLC and FT function in opposite configuration to how those same genes control time to flowering. For seed dormancy, FT regulates seed dormancy through FLC gene expression and regulates chromatin state by activating antisense FLC transcription. Thus, in Arabidopsis the same genes controlled in opposite format regulate flowering time and seed dormancy in response to the temperature changes that characterize seasons.